Sucker-rod attachment to prevent sanding-up of well-pumps



R. L. BURNS AND F. F. WINGER.

SUCKER ROD ATTACHMENT TO PREVENT SANDING UP 0F WELL PUMPS.

APPLICATIONv FILED JULY 12,1920.

Patented May 24, 1921.-

1NVENTORS A9044);

UNITED STATES PATENT OFFICE.

ROBERT LEE BURNS AND FRED FREAMONID WING-ER, OF 'IAFT, CALIFORNIA.

- scones-Ron ATTACHMENT To PREVENT SANDING-i1? or WELL-PUMPS.

Application filed. July 12,

To all whom it may concern:

Be it known that we, RO ERT LEE BURNS and FRED FREAMOND WINGER, citizens-of the United States, residing at Taft, in the county 5 of Kern andjState of California, have invented certain new and useful Improvements in Sucker-Bod Attachments to Prevent Sanding-Up of Well-Pumps, of which the following is a specification.

Our invention relates, in general, to oil and other well-pumps, and particularly to an attachment to the sucker-rods, the object of which" is to automatically liftthe pump 'plunger out of the working-barrel whenever sand enters the pump in suflicient quantity to prevent its operation.

By thus lifting the plunger when beginning to sand up, the loss of a working barrel and parting of the rods are prevented.

Our present invention is an improvement on that device or attachment for this same purpose, which is disclosed in our Letters Patent of the United States No. 1,327,611, granted to us January 18, 1920. The object of our improvement is to adapt the device for the smooth or plain surfaced, polished rods now commonly in use, and thereby simplify and cheapen the cost of manufacture as well as to provide for greater facility in adjustment and better maintenance, in comparison with the special construction contemplated and required by the pawl and ratchet form of grip of our previous patent.

To this end our invention consists in the novel attachment whichwe shall now fully describe by reference to the accompanying drawings, in which-- Figure 1 is an elevation,- broken, of our attachment.

Fig. 2 is a section on the line 22 of Fig. 1. V

Fig. 3 is a vertical central section,- enlar ed, of the operative portion of the attachment. FFig. 4 is a section on the line 4+4 of l is the body or stock of the attachment which-is in the form of a tube, to the top of which is welded the cross bar 2 for the walking-beam (not shown) or other source of reciprocative motion usually employed in the operation of well pumps. At the lower end of the tubing 1 is welded or otherwise secured, the foot 3, which is split or made in two sections in the plane of its axis and is Specification of Letters Patent.

.the foot 3 ma 1920. 'Serial no. 395,568.

adapted to receive the smooth surfaced, polishedrod 4 which passes axially through it and through the tube 1. Within the foot 3 is formed the downwardly tapering seat in their movement in the foot are guided by cap screws 6 set into them, and which play in slots 8 made in the foot 3. 1 In the top of the slips are made small recesses 9 for seating the'spring 7, the upper end of which bears against the root-of the seat cavity 3.

10 is a clamp which embraces the split foot 3, being secured to one-half by the cap screws 11, and engaging the other half by means of a tightening screw 12.

By loosening the clamp 10, the halves of separate to allow the rod 4 to be moved ownward for setting it when desired, and in practice the tubing stock-1 will be split up a suflicient distance, as shown in Fig. 1 at 1' to allow the foot to be sprung apart, for inserting the slips.

The lower end of the rod 4. is adapted for connection, as indicated at 13, in Fig. 1, with the sucker-rod string extending to the pump-plunger.

The operation of the device is as follows :---It is suspended from the walkingbeam or other source of reciprocative motion, by means of the cross bar 2 of the tubing stock 1. The lower end of the rod ,4 is made fast at 13 to the sucker-rods, and

stroke, the slips 5 rising in their seat and slipping along said -rod. But at the end of the down-stroke, the slips 5 catch the rod- 4 lower down and upon the up-stroke. the descend and: wedge in their seat and H said rod together with the sucker-rods, "so

Patented May 24, 1921.

that the pump-plunger is raised out of the barrel. This condition continues until the plunger is clear of the sand.

We claim 1. A sucker-rod attachment for the described purpose comprising a stock adapted for suspension from a source of reciprocative motion, said stock having a split foot; a smooth rod fitted through said foot for relative linear movement therein and adapted for connection with the sucker-rod;.- a

wedge slip housed within said foot and adapted to positively engage the smooth rod on the upward stroke of the stock and to'slip it in the reverse direction; and a regulatable clamp embracing said foot whereby the smooth rod may beadjusted therein.

2. A sucker-rod attachment for the described purpose comprising a stock adapted for suspension from a source of reciprocative motion, said stock having a split foot with a downwardly tapered seat-cavity and a slot leading through the wall into said cavity; a smooth rod fitted through said foot for relative linear movement therein, and adapted for connection with the sucker-rod; a wedge slip housed within and coacting with the seat-cavity of said stock, said slip being adapted to positively engage the smooth rod on the upward stro e of the.

stock and to slip it in the reverse direction; a guide member secured in said slip and. playing in the slot of the foot; and a regulatable clamp embracing said foot, whereby and adapted for connection with the suckerrod; a plurality of wedge slips housed with in and" coacting with the seat-cavity of sair stock, said slips being adapted to positively engage the smooth rod on the upward StI'OkP of the stock and to slip it in the reverse direction; a guide member secured to each slip and playing in its corresponding slot of the foot; a spring housed within the seat-cavity of the foot and bearing on the slips therein; and a regulatable clamp embracing said split foot, whereby the smooth rod may be adjusted therein. In testimony whereof we have signed our names to this specification.

ROBERT LEE BURNS. FRED FREAMOND W'INGER. 

